:root{--bg: #0f1115;--surface: #1a1d24;--surface-2: #232730;--border: #2e333d;--text: #e8eaed;--muted: #9aa0aa;--accent: #3ddc97;--accent-dark: #2bb87b;--danger: #ff6b6b;--positive: #3ddc97;--negative: #ff8a8a;--radius: 12px;--shadow: 0 6px 24px rgba(0, 0, 0, .3)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}a{color:var(--accent)}.container{max-width:880px;margin:0 auto;padding:24px 20px 80px}.brand{display:flex;align-items:center;gap:10px;margin-bottom:4px}.install-btn{font-size:.82rem;padding:7px 12px;white-space:nowrap}.brand h1{font-size:1.6rem;margin:0;letter-spacing:-.02em;min-width:0;overflow-wrap:anywhere}.brand .logo{font-size:1.6rem}.tagline{color:var(--muted);margin:0 0 28px;font-size:.95rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px;box-shadow:var(--shadow)}.card h2{margin:0 0 16px;font-size:1.15rem}.card h3{margin:0 0 12px;font-size:1rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:6px}input,select,textarea{width:100%;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;color:var(--text);padding:11px 12px;font-size:16px;font-family:inherit;max-width:100%}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}.field{margin-bottom:14px}.row{display:flex;gap:12px;flex-wrap:wrap}.row>*{flex:1;min-width:140px}button{background:var(--accent);color:#06281c;border:none;border-radius:8px;padding:10px 18px;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .15s ease}button:hover{background:var(--accent-dark)}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:var(--surface-2);color:var(--text);border:1px solid var(--border)}button.secondary:hover{background:var(--border)}button.link{background:none;color:var(--danger);padding:4px 8px;font-weight:500}button.link:hover{background:#ff6b6b1a}.error{background:#ff6b6b1f;border:1px solid var(--danger);color:var(--negative);padding:10px 14px;border-radius:8px;margin-bottom:16px;font-size:.9rem}.share-box{display:flex;gap:8px;align-items:center}.share-box input{flex:1;min-width:0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem}.share-box button{flex:0 0 auto}.list-item{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--border)}.list-item>div:first-child{min-width:0;overflow-wrap:anywhere}.list-item:last-child{border-bottom:none}.list-item .meta{color:var(--muted);font-size:.82rem}.amount{font-variant-numeric:tabular-nums;font-weight:600}.pos{color:var(--positive)}.neg{color:var(--negative)}.pill{display:inline-block;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:2px 10px;font-size:.75rem;color:var(--muted);margin-left:8px}.settle-line{display:flex;align-items:center;gap:8px;padding:10px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}.settle-line:last-child{border-bottom:none}.muted{color:var(--muted)}.empty{color:var(--muted);font-size:.9rem;padding:8px 0}.participant-grid{display:grid;grid-template-columns:1fr auto;gap:8px 12px;align-items:center;margin-top:8px}.participant-grid .name{font-size:.92rem}.participant-grid input[type=text],.participant-grid input[type=number]{width:110px}.checkbox-row{display:flex;align-items:center;gap:8px}.checkbox-row input[type=checkbox]{width:auto}.back-link{display:inline-block;margin-bottom:16px;font-size:.9rem}.spacer{height:8px}.toast{font-size:.85rem;color:var(--accent);margin-left:8px}.toast-banner{position:sticky;top:8px;z-index:50;background:var(--surface-2);border:1px solid var(--accent);color:var(--text);padding:10px 14px;border-radius:10px;margin-bottom:12px;box-shadow:var(--shadow);font-size:.9rem}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal{width:100%;max-width:420px;margin:0}.identity-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.identity-list button{flex:0 0 auto}.divider-text{color:var(--muted);font-size:.8rem;text-align:center;margin:10px 0}.group-avatar{width:44px;height:44px;border-radius:12px;object-fit:cover;border:1px solid var(--border)}.avatar-edit{display:inline-flex;align-items:center;gap:8px;cursor:pointer;color:var(--muted);font-size:.82rem}.avatar-edit input[type=file]{display:none}.tabs{display:flex;gap:4px;position:sticky;top:0;background:var(--bg);padding:6px 0;margin-bottom:14px;z-index:40;overflow-x:auto;-webkit-overflow-scrolling:touch;border-bottom:1px solid var(--border)}.tab{flex:1 0 auto;background:none;color:var(--muted);border:none;border-bottom:2px solid transparent;border-radius:0;padding:10px 12px;font-weight:600;white-space:nowrap}.tab:hover{background:var(--surface-2)}.tab-active{color:var(--text);border-bottom-color:var(--accent)}.fab{position:fixed;bottom:20px;inset-inline-end:20px;z-index:60;border-radius:999px;padding:14px 20px;font-size:.95rem;font-weight:700;box-shadow:0 8px 24px #00000059;display:inline-flex;align-items:center;gap:6px}@media(max-width:560px){.container{padding:16px 14px 72px}.card{padding:16px}.brand h1{font-size:1.3rem}.card h2{font-size:1.05rem}.row>*{min-width:100%}.list-item{flex-wrap:wrap}.settle-line button,.list-item button.link{padding:6px 10px}button{padding:11px 16px}.participants-head{flex-wrap:wrap}.danger-row{flex-direction:column;align-items:stretch;gap:8px}.exp-right{margin-inline-start:auto}.receipt-attached{flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}.chip-row{display:flex;flex-wrap:wrap;gap:6px;margin:2px 0 10px}.chip{background:var(--surface-2);border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:4px 10px;font-size:.8rem;cursor:pointer}.chip-on{background:var(--accent);color:#06281c;border-color:var(--accent);font-weight:600}.scan-cta{width:100%;background:var(--surface);border:1px dashed var(--accent);color:var(--accent);border-radius:var(--radius);padding:14px;margin-bottom:20px;font-weight:600;cursor:pointer}.scan-cta:hover{background:var(--surface-2)}.receipt-upload{display:inline-block;background:var(--accent);color:#06281c;border-radius:8px;padding:11px 18px;font-weight:600;cursor:pointer}.receipt-upload input{display:none}.receipt-item{border-bottom:1px solid var(--border);padding-bottom:8px;margin-bottom:8px}.bar-row{display:grid;grid-template-columns:minmax(80px,120px) 1fr auto;align-items:center;gap:8px;padding:5px 0}.bar-label{font-size:.85rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.bar-track{background:var(--surface-2);border-radius:6px;height:12px;overflow:hidden}.bar-fill{background:var(--accent);height:100%}.bar-value{font-size:.85rem}.toast-banner{display:flex;align-items:center;justify-content:space-between;gap:12px}.toast-undo{flex:0 0 auto;background:none;border:1px solid var(--accent);color:var(--accent);padding:4px 12px;border-radius:6px;font-weight:600}.ios-hint{margin-top:16px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-size:.85rem;color:var(--muted)}:root[data-theme=light]{--bg: #f6f7f9;--surface: #ffffff;--surface-2: #eef1f4;--border: #d8dde3;--text: #1a1d24;--muted: #5c6470;--accent: #1f9d62;--accent-dark: #18814f;--danger: #d64545;--positive: #1f9d62;--negative: #c0392b;--shadow: 0 6px 24px rgba(0, 0, 0, .08)}.summary-banner{border-radius:10px;padding:12px 14px;margin-bottom:12px;font-weight:600;font-size:1.02rem;border:1px solid var(--border);background:var(--surface-2)}.summary-banner.pos{color:var(--positive);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}.summary-banner.neg{color:var(--negative);border-color:color-mix(in srgb,var(--danger) 45%,transparent)}.group-row{display:flex;align-items:center;gap:12px;width:100%;background:none;border:none;border-bottom:1px solid var(--border);border-radius:8px;padding:12px 8px;text-align:start;color:var(--text);cursor:pointer}.group-row:hover{background:var(--surface-2)}.group-row:last-child{border-bottom:none}.group-avatar-fallback{display:inline-flex;align-items:center;justify-content:center;background:var(--surface-2);font-size:1.3rem}.group-row-main{display:flex;flex-direction:column;gap:2px;min-width:0;flex:1}.group-row-title{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.group-row-sub{font-size:.85rem;color:var(--muted)}.group-row-remove{flex:0 0 auto;color:var(--muted);font-size:.9rem;padding:4px 9px;border-radius:6px;cursor:pointer;-webkit-user-select:none;user-select:none}.group-row-remove:hover{background:var(--surface);color:var(--danger)}.date-header{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:14px 0 2px;font-weight:600}.exp-row{align-items:center}.exp-left{display:flex;gap:10px;min-width:0;flex:1;align-items:center}.exp-icon{flex:0 0 auto;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;font-size:1.1rem}.exp-info{min-width:0}.exp-title{overflow-wrap:anywhere}.exp-right{display:flex;align-items:center;gap:6px;flex:0 0 auto}.exp-persp{display:flex;flex-direction:column;align-items:flex-end;text-align:end}.exp-persp-label{font-size:.72rem;color:var(--muted);white-space:nowrap}.exp-actions{display:flex}button.link.neutral{color:var(--muted)}button.link.neutral:hover{background:var(--surface-2);color:var(--text)}.settle-mine{font-weight:600}.desc-with-icon{display:flex;align-items:center;gap:8px}.desc-with-icon input{flex:1}.desc-icon{flex:0 0 auto;width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;font-size:1.25rem}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;color:#fff;font-weight:700;flex:0 0 auto;line-height:1;text-transform:uppercase}.member-line{display:flex;align-items:center;gap:10px;min-width:0}.participants-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:4px}.participants-head-right{display:flex;align-items:center;gap:10px}.per-person{font-size:.82rem;white-space:nowrap}.danger-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--border)}.danger-row:last-child{border-bottom:none}.danger-row .meta{color:var(--muted);font-size:.8rem;margin-top:2px}.danger-btn{flex:0 0 auto;background:none;color:var(--danger);border:1px solid var(--danger)}.danger-btn:hover{background:var(--danger);color:#fff}.expense-search{margin-bottom:12px}.member-row{cursor:pointer;border-radius:8px}.member-row:hover{background:var(--surface-2)}.receipt-chip{background:none;border:none;padding:0 4px;margin-inline-start:6px;font-size:.95rem;cursor:pointer}.receipt-chip:hover{background:none;transform:scale(1.15)}.receipt-attached{display:flex;align-items:center;gap:10px}.receipt-thumb{width:56px;height:56px;object-fit:cover;border-radius:8px;border:1px solid var(--border)}.receipt-viewer{background:var(--surface);border-radius:var(--radius);padding:14px;max-width:92vw;max-height:88vh;display:flex;flex-direction:column;gap:12px;align-items:center}.receipt-viewer img{max-width:100%;max-height:76vh;object-fit:contain;border-radius:8px}@media print{body{background:#fff;color:#000}button,input,select,textarea,.modal-backdrop,.toast-banner,.scan-cta,.install-btn,.back-link,.share-box{display:none!important}.card{box-shadow:none;border:1px solid #ccc;break-inside:avoid}}